EA-HPU

High-pressure Hydraulic Power Unit for aircraft systems maintenance and testing

The EA-HPU is ElectroAir’s advanced Hydraulic Power Unit (HPU) designed to provide precise, stable and high-pressure hydraulic power for aircraft maintenance, testing, calibration and troubleshooting.
Built for both civil and military aviation environments, it delivers up to 5000 PSI (340 bar) of regulated hydraulic pressure with assured 100% duty cycle, enabling uninterrupted operation during mission-critical procedures.

Its industrial-grade Lincoln® motor, aviation-grade filtration, non-corrosive aluminium body and precision instrumentation ensure maximum reliability, clean fluid output, and long aircraft component life.

Main specifications

🔹 Maximum pressure: 450–5000 PSI (30-340 bar)
🔹 System max flow: 28 GPM (50 Hz)
🔹 Duty cycle: 100% continuous
🔹 Motor: 75 HP (56 kW) Lincoln® industrial motor
🔹 Hydraulic fluid: Skydrol-compatible (fluid not included)
🔹 Voltage: 380 VAC, 3-phase, 50 Hz
🔹 System hoses: #16 supply, #24 return (50 ft / 15.2 m)
🔹 Pressure adjustment range: 250 PSI to full output
🔹 Flow adjustment: 0 to full GPM
🔹 Dimensions (LxWxH): 218 × 142 × 137 cm
🔹 Weight: 1769 kg

Performance

🔹 Guaranteed delivery of maximum flow at maximum pressure
🔹 Designed for continuous operation in intensive maintenance cycles
🔹 Heavy-duty motor starter with overload protection
🔹 High-efficiency aluminium oil cooler with 3-phase fan
🔹 Stainless-steel 70-gallon reservoir with sight glass and selector valves (aircraft/unit reservoir)

Construction features

🔹 All-welded aluminium frame and pan (no corrosion, no paint to chip)
🔹 Removable top panels
🔹 Large hinged rear access door for maintenance
🔹 Forklift brackets for easy manoeuvring
🔹 NEMA 4/12 liquid-proof electrical enclosures
🔹 Heavy-duty castors (two fixed, two swivel) with floor lock
🔹 Stainless-steel hose & cable storage bracket

Filtration system

🔹 Super-clean aviation-grade filtration for maximum aircraft component protection
🔹 High-efficiency 3-micron absolute pressure filter
🔹 Large 6-micron absolute return filter
🔹 Easy-access exterior fluid sampling valve
🔹 Cleanliness complies with NAS 1638 requirements

Instrumentation & control

🔹 High-pressure dual-scale flow meter (4% accuracy)
🔹 Test-quality pressure gauge (1% accuracy)
🔹 Dual-scale pyrometer / oil temperature gauge (1% accuracy)
🔹 Hour meter
🔹 Pump flow and pressure adjustment controls
🔹 By-pass dump valve
🔹 Operational LEDs:
    • Pressure filter condition indicator
    • High fluid temperature warning

Standard features

🔹 Certificate of calibration included
🔹 50 ft (15.2m) electrical input cable
🔹 50 ft (15.2m) supply & return hoses (2 pcs)
🔹 Durable aluminium placards and panel-mounted instructions
🔹 Leak-proof aluminium pan covering full bottom area
🔹 Split system capability
🔹 Reservoir fill pump
🔹 Return sight glass
🔹 Couplings: KHC-3754 (1 set)

Use cases

🔹 Aircraft flight control actuation tests
🔹 Landing gear retraction/extension cycles
🔹 Hydraulic system flushing and pressure testing
🔹 Troubleshooting hydraulic components
🔹 MRO centers (A/B/C/D checks)
🔹 Military and civil aviation maintenance
🔹 Component test benches and calibration rigs

Need specifications, drawings, or pricing?

Click the button below or contact our team for documentation, budgetary pricing, or integration support.
Our engineers will help you configure the right Hydraulic Power Unit for your aircraft maintenance operations.

Tags: HPU | Hydraulic Power Unit | Hydraulic Test Stand | Aircraft Maintenance | Skydrol